'Board' in the Bible

And the Lord said to me, Take a great writing-board, and on it put down in common letters, Maher-shalal-hash-baz;

Certainly black cumin is not threshedwith a threshing board,and a cart wheel is not rolled over the cumin.But black cumin is beaten out with a stick,and cumin with a rod.

Now go, put it in writing before them on a board, and make a record of it in a book, so that it may be for the future, a witness for all time to come.

See, I will make you into a sharp threshing board,new, with many teeth.You will thresh mountains and pulverize themand make hills into chaff.